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Bug#841420: --enable-default-pie breaks kernel builds

Control: reassign -1 linux 4.7.8-1
Control: severity -1 serious
Control: tags -1 patch

Hi David,

2016-10-20 14:02 GMT+02:00 David Weinehall <tao@debian.org>:
> Package: gcc-6
> Severity: important
> Version: 6.2.0-7
> --enable-default-pie (first enabled in gcc-6 6.2.0-7) causes kernel
> builds to fail.  If the kernel is configured with the stack protector
> enabled it'll fail with a rather unhelpful error message claiming
> that the compiler doesn't support -fstack-protector,
> but the problem is in fact caused by:
> kernel/bounds.c:1:0: error: code model kernel does not support PIC mode
> (The kernel is built with -mcmodel=kernel)
> I think it's fair to say that the kernel is kind of an important piece
> of software and that it's imperative that we don't break kernel builds...

The kernel is very important indeed and it did break in our build test.
I'm sorry, somehow I missed filing bug for the linux package, just for
The following patch fixes the FTBFS:

--- linux-4.7.8/debian/rules.d/Makefile.inc
+++ linux-4.7.8/debian/rules.d/Makefile.inc
@@ -5,7 +5,8 @@

 SHELL = /bin/sh -e

+CC = $(CROSS_COMPILE)gcc -no-pie
+LD = $(CROSS_COMPILE)ld -no-pie
 CFLAGS := $(shell dpkg-buildflags --get CFLAGS) -Wall
 CPPFLAGS := $(shell dpkg-buildflags --get CPPFLAGS) \

Maybe the ld part is obsolete, I have not checked that.


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